JPS5659007A - Pressure fluid circuit - Google Patents

Pressure fluid circuit

Info

Publication number
JPS5659007A
JPS5659007A JP13468979A JP13468979A JPS5659007A JP S5659007 A JPS5659007 A JP S5659007A JP 13468979 A JP13468979 A JP 13468979A JP 13468979 A JP13468979 A JP 13468979A JP S5659007 A JPS5659007 A JP S5659007A
Authority
JP
Japan
Prior art keywords
valve
direction change
over
pressure fluid
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13468979A
Other languages
Japanese (ja)
Inventor
Megumi Miyake
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nabco Ltd
Original Assignee
Nabco Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nabco Ltd filed Critical Nabco Ltd
Priority to JP13468979A priority Critical patent/JPS5659007A/en
Publication of JPS5659007A publication Critical patent/JPS5659007A/en
Pending legal-status Critical Current

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  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To dispense with a pressure compensation valve, by causing a spool valve to perform pressure compensation depending on load applied to an actuator in a simultaneous operation type pressure fluid circuit including plural direction change- over valves.
CONSTITUTION: A pressure fluid circuit has direction change-over valves 10a, 10b, which are operated by pilot operating sections 1a, 1b connected to a pilot pressure fluid source 2. The direction change-over valve 10a comprises a spool valve 15a, pilot sections 11a, 12a for applying a thrusting force to the spool valve 14a, load circuits 16a, 17a connected to an actuator (not shown in the drawing), a supply circuit 22a which is connected to the load circuit 16a or 17a as a result of movement of the spool valve 15a, and a bridge circuit 27a. The other direction change-over valve 10b has the same construction as the former direction change-over valve 10a. A check valve (pressure reducing valve) 28a etc. are provided to open or close the bridge circuit 27a. The annular groove 21b of a valve element 13a is connected to those 19a, 20a of the direction change-over valve 10a.
COPYRIGHT: (C)1981,JPO&Japio
JP13468979A 1979-10-17 1979-10-17 Pressure fluid circuit Pending JPS5659007A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13468979A JPS5659007A (en) 1979-10-17 1979-10-17 Pressure fluid circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13468979A JPS5659007A (en) 1979-10-17 1979-10-17 Pressure fluid circuit

Publications (1)

Publication Number Publication Date
JPS5659007A true JPS5659007A (en) 1981-05-22

Family

ID=15134271

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13468979A Pending JPS5659007A (en) 1979-10-17 1979-10-17 Pressure fluid circuit

Country Status (1)

Country Link
JP (1) JPS5659007A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5005467A (en) * 1987-05-18 1991-04-09 Atlas Copco Aktiebolag Pilot-operated flow controlling directional control valve with copying spool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5005467A (en) * 1987-05-18 1991-04-09 Atlas Copco Aktiebolag Pilot-operated flow controlling directional control valve with copying spool
US5095806A (en) * 1987-05-18 1992-03-17 Atlas Copco Aktiebolag Device in a hydraulic power system connected to a load driving hydraulic motor

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